Presented in a limited edition of 200 watches, the GRAND LANGE 1 MOON PHASE
"Lumen" combines a brilliant moon-phase display with a mystically luminous outsize date that reflects the characteristic style of the brand icon.
In 2013, A. Lange & Söhne introduced the GRAND LANGE 1 "Lumen", a watch with a semitransparent sapphire-crystal dial that exposes the ingenious disc configuration of the Lange outsize date. It was followed a year later by the GRAND LANGE 1 MOON PHASE with a prominent in-dial moon-phase display that reproduces the lunations with an accuracy of 99.998 per cent. Now, the GRAND LANGE 1 MOON PHASE "Lumen" combines these two remarkable accomplishments in one watch.
Model: Grand Lange 1 Moon Phase “Lumen” Ref. 139.035F
Lange manufacture calibre L095.4, manually wound, crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; plates and bridges made of untreated German silver; balance cock engraved by hand
Movement parts: 446
Screwed gold chatons: 7
Escapement: Lever escapement
Oscillator: Shock-resistant screw balance; balance spring manufactured in house with a frequency of 21,600 semi-oscillations per hour, precision beat adjustment system with lateral setscrew and whiplash spring
Power reserve: 72 hours when fully wound
Movement dimensions: Diameter: 34.1 millimetres; height: 4.7 millimetres
Time indicated in hours, minutes and subsidiary seconds with stop seconds; power-reserve indicator; luminous outsize date; moon-phase display
Crown for winding the watch and setting the time, one button for quick outsize date corrections, recessed push piece for correcting the moon-phase display
Diameter: 41.0 millimetres
Height: 9.5 millimetres
Crystal and back: Sapphire crystal (Mohs hardness 9)
Basic dial (outer ring, hours, minutes, subsidiary seconds) in solid silver, black-oxidised; semi-transparent sapphire crystal; luminous details: outsize date, Roman numerals and markers for the time, power-reserve indicator and moon-phase display
Hands: Rhodiumed gold, luminous
Hand-stitched alligator leather strap, black
Buckle: Platinum deployant buckle
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